Blazor Server SignalR capabilities

Question

I have developed Blazor Server application.

It is hosted on Azure, and I also created SignalR service that my app uses.

Now the Standard plan for SignalR says:

1,000 connections/unit

1,000,000/Unit/Day

41.41 EUR/Month/Unit

0.84 EUR per million messages

How many concurrent users can browse my website on this plan?

If I understand this correctly each user can have max 1000 connections and 1M messages sent.

And pricing 41€ per unit per month... does this mean if I have 10 concurrent users I will pay 410€?

Answer 1

Hi @rokolab ,

Before answering your question, we need to know that if our application assumes that there are multiple pages that use Azure Signalr, then a single user opens 2 pages, that is, 2 connections are established with Azure Signalr.

For example, if user A opens 10 identical pages using the signalr service, and user B opens 2 different pages using the signalr service, the total number of connections is 12.

Question 1: 1,000 connections/unit

Answer: The number of connections that can currently be accepted depends on unit, generally by default, the unit is created at 1, assuming that your Azure Signalr has only one unit, in your application, you can connect up to 1000 users.

Question 2:1,000,000/Unit/Day

Answer: This should be the number of messages that are free to use in Standard/Premium Plan.

Question 3: 41.41 EUR/Month/Unit

Answer: When I don't see a screenshot of your billing page, I can't accurately describe this line.
It seems to be stating that each unit is charged at 41.41 EUR per month. But as far as I know, this charge is related to time, and there are many factors related to the number of messages and unit.

Question 3: How many concurrent users can browse my website on this plan?
If I understand this correctly each user can have max 1000 connections and 1M messages sent.
And pricing 41€ per unit per month... does this mean if I have 10 concurrent users I will pay 410€?

Answer:

The maximum number of connections is 995 users when you have only one unit. Let me show you.

If you have one server and one hub in webapplication. The server connection count= 1(server) x 1(hub) x 5 (default value)

Client Connection Count = 1000-5 =995

the maximum size of each message is 2KB, assuming that 7KB messages will be split into 4 messages, and the actual message will use the quota of 4 messages.

So 10 concurrent users don't have to pay 410€.

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Answer 2

Here is a screenshoot when I try to scale up: